Electric pencil sharpener



July 1 1924.

- J. GROEGER ELECTRIC PENCIL SHARPENER Filed April 12 cured to a collar carried by the motor are J'OH'N GROEGER, OF

PATENT OFFICE.

LINCOLN, ILLINOIS.

EECTRIC PENCIL SHARI'ENEB.

Application filed April 12, 1928. Serial 1%. sauna.

.To all whom itmay concern:

Be it known that I, JOHN GROEGER, a citizen of the United States, residing at Lincoln, in the countyof Logan, State of Illinois, have invented a new-and useful Electric Pencil Sharpener; and I do hereby declare the followin to beat full, clear, and exact description o the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to electric pencil sharpeners and has for its object to provide a device of-this character wherein when a pencil is inserted in the device for sharpening, an electric motor will be started, and after the sharpening'operation upon removal of the pencil the motor will be stopped.

A further object is to provide an electric pencil sharpencr, said sharpener comprising a motor disposed within a casing, an auxiliary casing carried by the motor, and into which the shaft of the motor extends. Se-

' oppositely disposed cutting elements, the

outer ends of which are rotatably mounted on a bearingmf a pencil receiving sleeve, which pencil, when inserted and removed into and out of the sleeve actuates a circuit maker and breaker for starting and stopping the motor. Also to provide the end of the motor shaft with a depression, with which depression the end ofthe pencil engages for limiting the .inward movement thereof, and consequently stopping the pencil sharpening operation.

With the above and other objects in view the invention resides in the combination and arrangement of parts as hereinafter set 1 invention.

. &

forth, shown in the, drawing, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the In the drawing 4 I Figure 1 is a side elevation of the device,

part being shown in section to better illustrate thesame.

Figure 2 is a front elevation. 4 Figure 3 is a front elevationof the device with the casing removed.

Figure 4 1s a top planview of one of the cutter members.

Figure 5 is a view of one of the cutting elements showin the inner *sidesthereof. 1 Referring to t e drawing, the numeral 1 Disposed on the shaft 2 is a designates a conventional form ofelectric motor and 2 the shaft thereof. Secured to the flange 3 of the casing 4 of the motor by means ofscrews 5 is a late 6 in which the shaft 2 has a bearing. to a plate 7 by means of members 8, therefore the plate? is held in a. arallel plane to the plane of the plate 6. xtending inwardly from the inner side of the plate 7 is an annular sleeve 9. which sleeve receives the pencil 1O afterit has passed through the outwardly extending sleeve 11 carried by preventing excessive cutting away of the pencil during the sha-rpenin operation. anged sleeve 15, andto which sleeves the inner ends of the plates 12 are secured by means of the set screws, 16, which, extend through the plates and the sleeve and engage theshaft 2, thereby rigidly but det-achably connecting the cutter plates 12 in 'such a manner that they may be easily and quickly removed.

Surrounding the inner end of the sleeve 9.

is a bearing 17, and surrounding said bearlate 6 is connected ing 17 is an annular member 18, to which the outer ends of the plates 12 are secured by'meansof set screws '19, therefore it will be seen that when the set screws 19 are tightened, the bearing member 17 will be securely held and at the same time the outer end of the plate 12 supported and held in such a manner that the bearing ring 17 may easily rotate on the s1eeve'9. The sleeves 9 and .11 are axially disposed in relation to the shaft 2, and consequently when the penoil 10 is passed therethrough the pencil will come into engagement. with the cutting teeth 13 of the plate 12, thereby insuringa uniform and accurate sharpening of the pencil. Housing the plates 6 and 7 is a removable 'ca'sin 20, which casing is secured to plates 6 an -7 by means of screws 21, which ass through the casing 20 and are thread in tothe plate 6. The casing 20 not only prgtects the mechanism, but at the same time allows ready access thereto for repair purposes.

Extending outwardly from the forward side of plate 7 are spaced arms 22, 'to the upper sides of. which is secured, by means of I screws 23, atransversely disposed member the'contaet en tact member 27 -carried by a second. spring "24 formed from insulating material, which member 24 supforts a s ring contact arm 25,

26 of w ich underlies 'a conarm 28. The arm 28 sup orts a bevell'edblock 29 formed from con uctor material, which block extends through an aperture 30', in the sleeve 11 to apositionwhere it will v ncil 10 is inserted in the fsleeve'll.- When t e pencil 10 engages the= 1 block 29, it is forced downwardly,

be engaged when a forcing the-contact-member 27 into engage- -ment with the contact member 28, and closthe motorcontrolling circuit through the wires 31, which lead to the motor and to an source-of power 32', such for instance as a battery,. thereby starting the motor .when'the pencil is inserted in the machine. .After the pencil sharpening operation the removal of the pencil allows the bev- .elled' block 29 to move'upwardly to the position'. shown in Figures 1 and 3 where the contactmembers 26 and 27 are out of engagementwith each otherkthereby breaking the circuit-and causing t e motor to stop.

"It will be seen inthe, above structure the motor" is automatically started and stopped upontheinsertion ofthe pencil or removal thereof, and consequently electric'current'is chine"onlyoperatesduringthe sharpening conserved, and the pencil sharpeningma t 'ereby I cutter members detachably connected to the shaft, the other ends of said cutter members operation, It will also. be seen that thereis no danger of the machine being left running throug carelessness after a pencil sharpening operation as would be the case if the Y motor should be controlled form of switch. a

The invention having been set forth what' is claimed as new and usefulis:'

by a conventional A pencil sharpening--maehine,- said'ma- I chine comprising an encased motor, a casin detachably connected to the motor, a sha carried by the motor-"and extending into the casing, -a tubular member for the rece tion ofa pencil and in-axial relation to the s aft,

being mounted on a bearing carried by the tubular member, a pencil point engaging depression in the end of the shaft and formmg means for engaging a pencil point and a i limitin the mward movement of a pencil, a beve edblock extending through an aperture in the tubular member. and .into the path of the pencil, said bevelled member forming means whereby, when moved,- a

circuit maker and breaker will be actuated 

